近年来,化学建材产业作为中国的新兴产业取得了长足的进步和迅猛发展。新型环保塑料管材的广泛使用,是一场替代焊接管和铸铁管的革命。 据了解,在国外,塑料管材正在不断替代金属或其它传统材料的管材,发展十分迅速。有关资料表明,1980～1990年期间,除塑料管材以外,其它各种材料的管材增长率总和还不足2％,但塑料管材的增长率却是其它各种管材增长率总和的4倍,达到8％。进入90年代以来,塑料管材的需求量仍以每年4.2％的速度增长,其产值约以每年8％的速度递增。 我国自20世纪70年代开始生产塑料管材,于80年代初 In recent years, the chemical building materials industry has made considerable progress and rapid development as an emerging industry in China. The widespread use of new environmentally-friendly plastic pipes is a revolution in replacing welded pipes and cast iron pipes. It is understood that in foreign countries, plastic pipes are constantly replacing pipes made of metal or other traditional materials and the development is very rapid. Relevant data indicate that during the period from 1980 to 1990, the total growth rate of all kinds of materials except plastic pipes was less than 2%, but the growth rate of plastic pipes was 4 times the total growth rate of other various pipes, reaching 8 %. Since the 1990s, the demand for plastic pipe is still growing at a rate of 4.2% per year, and its production value is increasing at an annual rate of 8%. China began producing plastic pipes in the 1970s, in the early 1980s